Name:
April 1, 1997
Instructor: C. Davila

1. Determine and for each each of the two defibrillation pulses shown below assuming each pulse is to deliver 300J to a load. Which of the two pulses is more desirable in terms of minimizing tissue damage due to heating? Explain your reasoning.

   

2. The hypothetical ECG pulse shown was measured from a patient having an implanted DDD pacemaker. One of the atrial beats and one of the ventricular beats resulted from stimulation by the pacemaker, the other beats occurred naturally. Label the ECG components associated with the pacemaker generated atrial and ventricular beats, then draw a diagram of the DDD pacemaker and explain your reasoning.

   

3. Assume that you have access to the signals: and . Assume that the highest frequency components of and are well below . Design a system for recovering using the fewest number of parts (multipliers, adders, filters, etc.). Justify that your design is correct. Briefly describe a biomedical application of your design.
4. A Fleisch pneumotachometer's calibration curve was measured in the lab and is plotted below:

   

   Develop a mathematical model,

   

   for the pneumotachometer, where is the pressure drop across the capillary tubes and Q is flow. What is the useful operating range in Hz for the pneumotachometer? Explain your answer.

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